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5 March 2021 High repetition rate high harmonic generation with ultra-high photon flux
Maxim Tschernajew, Steffen Haedrich, Robert Klas, Martin Gebhardt, Roland Horsten, Sven Weerdenburg, Sergey Pyatchenkov, Wim Coene, Christian Gaida, Sven Breitkopf, Jan Rothhardt, Tino Eidam, Jens Limpert
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Proceedings Volume 11676, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXI; 116761C (2021) https://doi.org/10.1117/12.2577496
Event: SPIE LASE, 2021, Online Only
Abstract
High harmonic generation at high repetition rate is realized with a high average power 100W, 600kHz fiber laser system. Optimization is done for two different operation regimes. At 69-75eV the source delivers a world-record photon flux of >10^11photons/s/harmonic when using argon gas jets. The use of neon gas allows for operation at significantly shorter wavelength. The important 93eV harmonic can be generated at 5·10^9 photons/s/(1% bandwidth), while even higher values of >10^10 photons/s/(1% bandwidth) are achieved between 115-140eV. The HHG source provides excellent long-term power stability of ~1% RMS for each of the operation regimes.
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Maxim Tschernajew, Steffen Haedrich, Robert Klas, Martin Gebhardt, Roland Horsten, Sven Weerdenburg, Sergey Pyatchenkov, Wim Coene, Christian Gaida, Sven Breitkopf, Jan Rothhardt, Tino Eidam, and Jens Limpert "High repetition rate high harmonic generation with ultra-high photon flux", Proc. SPIE 11676, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXI, 116761C (5 March 2021); https://doi.org/10.1117/12.2577496
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KEYWORDS
High harmonic generation
Coherence imaging
Extreme ultraviolet
Fiber lasers
Laser applications
Statistical analysis
Ultrafast phenomena
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